这是一种简单而廉价的电路,采用一只4013 CMOS触发器和几只无源器件,便可用来确定随机复位是由于电路板迭层烧坏还是监测器复位电路的信号所引起的。我们还可使用这种电路,像访问内存或访问I/O一样,来“捕捉”和保持其它逻辑电平的触发边缘。图1中的4013时钟输入(引脚3)信号逻辑电平的上升沿,将给触发器提供定时信号。因为该电路能保持数据 This is a simple and inexpensive circuit that uses a 4013 CMOS flip-flop and a few passive components that can be used to determine whether a random reset is caused by a board stack burn-in or a monitor reset circuit signal. We can also use this circuit to “snap” and hold the triggering edges of other logic levels like accessing memory or accessing I / O. The rising edge of the logic level of the 4013 clock input (Pin 3) in Figure 1 will provide the flip-flop with a timing signal. Because the circuit can hold the data